Sprinkler base



FIG. 1 is a perspective view of a sprinkler base according to the invention;

FIG. 2 is a front elevational view of the sprinkler base of FIG. 1;

FIG. 3 is a top plan view of the sprinkler base of FIG. 1;

FIG. 4 is a left side elevational view of the sprinkler base of FIG. 1;

FIG. 5 is a right side elevational view of the sprinkler base of FIG. 1;

FIG. 6 is a rear elevational view of the sprinkler base of FIG. 1; and,

FIG. 7 is a bottom plan view of the sprinkler base of FIG. 1.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sprinkler base, as shown and described. 